Not sure it's meant to be proper 'scary' - the way I see it it's used mostly to induce discomfort, as we all - well, most of us - like to remain physically intact. When watching skater or parkour clips where people deliberately risk life and limb and sometimes have very unpleasant encounters with stationary objects and the forces of gravity, most viewers will experience a solid, gut-wrenching feeling of discomfort, as the pain observed is very real, and anyone who has experienced a crash or fall similar to the one observed is bound to relate to it on a very, very basic level, without thinking too much about it.
Gore, to me, is different on many a level, as the body horror, the disintegration of the human physique and the buckets of blood are generally well-crafted displays of a very specific art, that of the special effects and makeup artists. Within the story/action of the movie, they are to be taken at face value and can cause discomfort in the viewer (we're not talking about the minority that's getting aroused here), but I think it really works best as a tool, a means, one chord in the piece that is the whole movie with an at least somewhat coherent story and - cherry on top - a moral dilemma of sorts.
I think Evil Dead does the nasty bits quite well, even though it was dirt cheap to produce. The pencil bit always gets to me, as it is just nasty. The makeup effects were more impressive twenty years back, but that's pretty much a given. The trees of rage and rape still disturb me, but I've repeatedly used them to approach the real issue of rape of women, which is normally not done by animated trees.
As for the remake - rot in hell. Then again, in this genre, we need to stick together so I'll definitely go watch it. But I think it's bad style to remake the already struggling classics of a fringe genre, come up with some new shit of your own, gosh darn it please with sugar frosting on top.
Army of Darkness is one of my favourite movies, I prefer the Singapore cut. I never got it and I never will why some of the best scenes of this movie have to be cut in 90% of all editions, it's a shame of Lucasian proportions. The windmill scene just needs to be complete and best left alone. It's a hilarious movie and the best work of Bruce Campbell so far. This is the only movie that sees me sad because there never was a second serving of sorts. It's absolutely not in my body horror/gore bin, though. It's more of an over-the-top slapstick comedy with tiny minute horror elements in it.